A person of stunningly low intelligence, derived through either genetic design flaw or a strong regimen of drug use and ignorance. Taken from "Do Androids Dream Of Electric Sheep" by Philip K. Dick. (Later made into the movie "Blade Runner"). See also: Chickenhead.
Me: "RayQuan tried to steal a pitbull, man! Why he wanna STEAL somethin' that EATS?"
Propciatta the crackho: "Cause the boy an anthead. Chickenheads look down on him."
Me: "Astute as usual, my pipe-huffin companion. Indeed."